| 1,7 → 1,7 |
|---|
| /****************************************************************** |
| * rebootd. |
| * |
| * A daemon which waits on specified TCP port for special string |
| * A daemon which waits on specified UDP port for special string |
| * (password) and reboots the computer. |
| * |
| * Command line: rebootd [--version] [--help] [--interface IP] [--port PORT] [--config CONFIG_FILE] |
| 15,7 → 15,7 |
|---|
| * -------------------------- |
| * |
| * Usage example (from any other host): |
| * echo -n "some password" | nc host_to_rebot 19 |
| * echo -n "some password" | nc -uo host_to_rebot 19 |
| * |
| * Copyleft 2005 Anatoli Klassen |
| * |
| 121,7 → 121,7 |
|---|
| sa.sin_port = htons(cfg->port); |
| sa.sin_addr.s_addr = (cfg->interface.s_addr ? cfg->interface.s_addr : INADDR_ANY); |
| |
| if((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) |
| if((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
| return -1; |
| |
| if(bind(s, (struct sockaddr *)&sa, sizeof(struct sockaddr_in)) < 0) { |
| 129,54 → 129,38 |
|---|
| return -1; |
| } |
| |
| if(listen(s, 1) != 0) { |
| close(s); |
| return -1; |
| } |
| |
| return s; |
| } |
| |
| static void listen_socket(const struct config *cfg, int soc) |
| { |
| int t; |
| char cmd[CMDSIZE]; |
| char buf[BUFSIZE]; |
| int br; |
| struct sockaddr_in sa; |
| socklen_t sa_len; |
| int cmdlen; |
| char buf[BUFSIZE]; |
| int br; |
| struct sockaddr_storage ss; |
| socklen_t ss_size; |
| |
| for(;;) { |
| sa_len = sizeof(sa); |
| if((t = accept(soc, (struct sockaddr *)&sa, &sa_len)) < 0) { |
| if(errno == EINTR) { /* EINTR might happen on accept(), */ |
| if(reconfig_needed) return; |
| } |
| else { |
| syslog(LOG_ERR, "cannot get connection, %s", strerror(errno)); |
| } |
| ss_size = sizeof(ss); |
| br = recvfrom(soc, buf, sizeof(buf)-1, 0, (struct sockaddr *)&ss, &ss_size); |
| |
| if(br == 0) { |
| if(reconfig_needed) return; |
| continue; |
| } |
| else if(br < 0) { |
| syslog(LOG_INFO, "cannot receive: %s", strerror(errno)); |
| continue; |
| } |
| |
| syslog(LOG_INFO, "connect from %s", inet_ntoa(sa.sin_addr)); |
| |
| cmd[0] = '\0'; |
| cmdlen = 0; |
| while((br = recv(t, buf, BUFSIZE, 0)) > 0) { |
| strncat(cmd, buf, min((uint)br, sizeof(cmd) - cmdlen - 1)); |
| cmdlen += min((uint)br, sizeof(cmd) - cmdlen - 1); |
| } |
| buf[br] = '\0'; |
| sleep(1); |
| close(t); |
| |
| syslog(LOG_INFO, "got command"); |
| |
| if(0 == strncmp(cmd, cfg->password, sizeof(cmd))) { |
| if(0 == strncmp(buf, cfg->password, sizeof(buf))) { |
| syslog(LOG_EMERG, "REBOOT"); |
| sleep(5); |
| if(reboot(RB_AUTOBOOT) < 0) { |
| syslog(LOG_ERR, "cannot reboot, %s", strerror(errno)); |
| syslog(LOG_ERR, "cannot reboot, %s", strerror(errno)); |
| } |
| } |
| } |
| 190,7 → 174,7 |
|---|
| static void pring_usage(int argc, const char* argv[]) |
| { |
| print_version(); |
| printf("\nA daemon which waits on specified TCP port for special"); |
| printf("\nA daemon which waits on specified UDP port for special"); |
| printf(" string (password) and reboots the computer.\n\n"); |
| printf("Usage: %s [--interface IP] [--port PORT] [--config CONFIG_FILE]\n", argv[0]); |
| printf(" or: %s --version\n", argv[0]); |
| 198,7 → 182,7 |
|---|
| printf("Defaults are port 19 and config /etc/rebootd.conf.\n\n"); |
| printf("Config file looks like:\n--------------------------\n"); |
| printf("interface=192.168.0.1\nport=19\npassword=\"some password\"\n--------------------------\n\n"); |
| printf("Then run from any other host:\necho -n \"some password\" | nc host_to_rebot 19\n"); |
| printf("Then run from any other host:\necho -n \"some password\" | nc -uo host_to_rebot 19\n"); |
| } |
| |
| static int print_error(const char *msg, const char *value) |